Grinding-machine.



J, J. HEY-S.

GRINDING TEAGHINE.

APPLIOATIONIILBD JULY 26, 1912 Eatensm Feb. 9, 1915.

2 SHEETS-SHEET l.

J Z FA J. J; HEYS.

GRINDING MACHINE.

APPLICATION FILED JULY 26,1913.

Patented Feb. 9, 1915.

n 2. HQ

2 SHEETS-SHEET 'z.

UNITED STATEd PATENT OFFIlt /E.

JOHN J. HEYS, OF LYNlNl, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY COMPANY 0F PATERSON. NEW" JERSEY. A CORPORATION OF NEW JERSEY.

GRINDING -1VIACHINE.

Specification of Letters Patent.

Patented Feb. 9, 1915.

Application filed July 26. 1913. Ser'ial No. 781.282.

1011!! u'lum/ it may cum-cm Be it known that 1, JOHN J. Heirs, a citizen of the United States, residing at Lynn. in the county of Essex and State of .llassachusetts. have invented certain Improve ments in (lfindin -Machines. of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to grinding machines, and particularly to machines for grinding the teeth of rotary cutters such as are used for trimming the edges or soles in the. manufacture of boots and shoes.

Cutters used for this and similar purposes are circular in peripheral outline, and include a plurality of evenly spaced teeth, the ends of which are formed to present cutting edges that correspond to the desired transverse contour of the edge of the work, and each tooth is backed off at a slight angle to the direction of its motion in order to give the clearance necessary to enable the tooth to out. If, in sharpening these cutters, the faces of some. of the teeth are ground to a greater extent than others, it is obvious that the length of the teeth'diamctrically of the cutter will. be caused to vary correspond ingly and the true periphery of the cutter will ot be maintained. Such variations frequently occur inpractice, especially where the cutter is presented by hand to the grinding member or where'the cutter is held in position for the grinding operation byresting one of its teeth upon a guide or positioning'member. In the latter case it is obvious that any irre ularities in the shape of the cutter such as; may be caused bythe warping of the wheel in hardening or an error in grinding, will necessarily be increased by repeated grindings. Cutters thus incorrectly ground tend to vibrate when in contact with the work and do not produce smooth edges. Itis the object of the present invention to provide a machine that will correct any inaccuracy in the shape of a cutter of the type specified and that will grind all the teeth to a uniform extent and on the same angle and maintain the teeth in correctly spaced relation.

To this end I have devised a machine that includes a grinding member and a cutter support. having provision for relative movement of the grinding member and support to effect alternate engagement and disengagement of the grinding member and cut ter, with a novel arrangement of means for holding the cutter in correct angular relation-to the grinding member and for effecting rotary movement of the cutter to bring the teeth successively into position to be ground. These and other features of the invention. including certain features of adjustment and other details of construction and combinations of parts, will be described with reference to an illustrative machine and pointed out in the appended claims.

Referring now to the accompanying drawings which illustrate a preferred embodiment of the invention, Figure l is a perspective view of the machine; Fig. 2 is a vertical section longitudinally through a portion of the machine seen at the right of Fig. 1 and taken on the line 22 of Fig. 3; Fig. 3 is a section on the line 3-3 of Fig. 2; and Fig. 4 is a detail section through the. grinding wheel, showing the wheel in operative relation to a cutter, the supporting elements for the latter being shown in section on line el-4 of Fig. 2.

Supported by the base or frame 2 of the machine is a standard l which provides bearings for a shaft that carries a grinding wheel 8. Supported also by the base 2 are standards 10 and 12 which are formed to provide bearings for-,a driving shaft 14, and loosely mounted on the latter and movable longitudinally with respect thereto is a pulley 16 which is to bedriven by a belt, not shown from a suitable source of power. ['pon one side of this pulley is formed one member 18 of a friction clutch. the complementary member 20 of which is formed on one side of a pulley 22 splined on the shaft 14 and connected by a belt H with a pulley 26 on the grinder shaft (3. By this arrange- I ment the members 18lhhd 20.- when in engagement. serve to clutch the pulley 22 to the pulley 16 and effect the rotation of the grinding wheel. and when these members are disengaged the grinder will remain idle irrespective of rotation of the pulley 16.

F or operating the clutch there is provided a hand member which serves to efiect movement of the bell crank 30 pivoted at 32 to the standard 10 and connected to move the pulley 16 longitudinally of its shafhby means of a member 3% positioned within a fifo'ove of a collar 36 secured to the pulley. he arm 38 of the bell. crank is provided with au'arc-shaped slot 40, in which enga es a bolt 4-2 which passes through the mem er 28 and has a thumb nut 44 threaded upon its outer-end. The member 28 is pivoted by means bf a pin, not shown, that engages upwardly in half bearings beneath the frame Curved guides i6 are engaged by a pin: also carried by the member F28 and thereb sea re to retain the latter in positionup A. slot 50 formed in the frame 23ermits the member 28 to be inserted "or re moved as desired.

It will be understood that movement of the member 2-8 will cause the bolt 42 to slide to different positions in the slot i0 and thereby move the bell crank so as to effect longitudinal movement of the pulley 16 and the clutch member 18 with respect to the shaft 14 and set or release the clutch. By means of the thumb nut 44, the member- 28 may, if desired, be clamped to the mem ber 38 so as to-hold the clutch securely in any position of adjustment.

ecured upon the frame 2 is a base 52 upon which is mounted adjustabl a supporting member 54 for a .movab e cutter supporting and carrying member 56.' The member 5-1- is mounted near one end upon pivots 58 that are threaded throu h lugs 60 on the base 52, Threaded throng the supporting member near the other end is an adjustable screw 62 that bears upon the base 52 and serves'to adjust the member 54. so as to vary the position ofthe cutter with reference to the grinding Wheel as -will be subsequently explained. The support 56 is slidably mounted on the member 54 and is held thereon by detachable plates 64 that project over the edges of the lower portion of the support. The support 56 is slidable in the gui ew ays thus provided through the movement of a hand'lever 66 that is plvoted on links 6B which are pivoted in turn to the member 52, and is pivotally connected to a projection on the end of the support at 70. -The cutter support 56, is provided with hearings in which is mounted rotatably a sleeve 72, and mounted within the sleeve and rotatable with respectthereto is a spindle 7 4. This spindle is provided at one end with a conical portion 76 upon which the cutter 18 is 'to'be mounted and secured by means of an expansion bushing 80. A rod 82 passes longitudinally through the spin- (lle and is provided with a head 84 that engages the bushing and serves, when the rod is moved longitudinally by means of a nut ,86 threaded upon the end thereof and engaqing the end of the spindle 7+1, to expan the bushing and hold the cutter securely in position. A pin 88 in the rod engages in a slot in the end of the conical feed member 1,1a7,esa

dvith this construction, rotation of the spin die 94 serves to move the block 96 longitu din'allythereof and thereby to eflect rela tive angular adjustment of the arms 90 and 98 and consequently to adjust the relative angular positions of the sleeve 72 and the spindle 74. The arms 90 and 98 are provided respectively with extensions 100 and 102, in the former of which is threaded a clampin screw 104, the shank of which is embrac by an arc-shaped slotted portion 106 of the other extension. With t is arrangement, tightening of the screw 104 will serve to secure the arms together in adjusted position.

Secured upon the sleeve member 72 is a 7 comprising a wheel provided with a peripheral series of teeth 108 corresponding in number to the teeth on the cutter to be ground. For advancing the cutter so as to indthe teeth successively I have provid means for enga i the feed wheel 10? and movingthe and the cutter the required distance at each re ciprocation of the supporting member 56.

This means comprises a slide 110 which is mounted to reciprocate vertically in the cas' ing 112 carried by a horizontal arm 113 on the support and a pawl 11 i pivoted on. the slide with a spring 116 to urge the pawl into engagement with the teeth of the feed or ratchet wheel. Movement of the slide through movement of the su iport 56 is of fected by engagement of a roller ill-l on the slide with the sides of a com slot 120 formed in a plate 122 secured on one side oi the supporting member 1'34, The arrangement is such that when the support 36 is moved in a direction to withdraw the cutter from contact with the grinding wheel the slide moved upwardly and the pawl turns the feed wheel and cutter the required distance to bring the next tooth into position to be'ground. \Vhcn the support is moved or some similar substance held by a screw shown in frictional engagement with the outer surface of the sleeve 72.

Additional means are provided for keeping the cutter in position while a tooth is bcing ground, consisting of a detent 130 pivoted on the arm 113 and held by a spring 132 in engagement between adjacent teeth of the feed wheel to keep the wheel from turning. The detent carries a roller 13h and a cam member 136 secured at one side of the support 54 acts upon the roller when the supporting member 56 is moved away from the grinding wheel so as to withdraw the detent from engagement with the wheel when the pawl 1.14 is acting to advance the feed wheel and the cutter. Obviously the detent will be likewise withdrawn when the support is moved in the opposite direction( but the friction devices 124 are depended upon at this time to keep the feed wheel from turning until the detent is again per- 39 it serves to hold the supporting member 54 in any position to which it is adjusted by means of. the screw 62.

The grinding wheel 8 is held adjust-ably upon its shaft by means of nuts 13R and 140 which engage oppositely threaded portions of the shaft-the nut H0 being threaded upon a reduced portion of the shaft and held thereon by means of a nut 142. By this means the wheel may he adiusted longitudinally of the shaft. (3 when desired.

The operation of the machine may be briefly described as follows: The cutter is first placed in any desired position upon the end of the spindle T4 vid by means of the nut 96 the rod 92 is moved longitudinallv so as to expand the bushing 80 and hold the cutter securely in position. ith' the grinding wheel idle the support 5P is then moved forwardly by means of the lever (i so as to bring the cutter into operative relation to the wheel with the latter proje tin between adiaccnt teeth of the cutter. With the screv; 10 i loosened the screw threaded spind e in is then manipulated so that the fa e of the tooth to be ground shall be brought into corre t relation to the face of the grinding wheel with the detent 130 engaging between adiacent teeth of the feed wheel. if necessary. the grinding 'wheel may be adjusted longitudinally of its shaft in order that the wheel and the'outter may be positioned in correct operative relation. The parts having been adiusted in this manner. the screw 1% is tightened so as to hold the feed wheel and the cutter in the correct for the diameter of the cutter to be ground.

and the screw 128 may be tightened to hold the support in the proper position. The clutch is now operated so as to start the rotation of the grindingwheel, and the sup-- porting member 56 is moved backwardly and forwardly by means of the lever 66, the cutter being advanced at each backward movement of the support in the manner alreadyexplained so as to bring a succeedipg tooth into position to be ground on a subsequent forward movement of the suppoit. The detent 1.30 serves to hold the cutter firmly in the correct angular relation at all times when the cutter is in position to engage with the grinding wheel.

It should be understood thatithe machine embodying. this invention is not limited to use in grinding edge trimming cutters for shoe soles, but'that it is equally adapted for grinding cutters of similar construction that It.

are used for various other purppses. should also be understood that although I have disclosed the invention as embodied in a. machine having the specific featuresof. construction shown and described, the invention is not thus restricted in its application; but various other embodiments are comprehended within the spirit and scope of the claims.

Having described the invention, what I claim as new and desireto secure by Letters Patentof the United States is the followmg:

1. A machine of the class described havirig, in combination, a. grinding member, a support for a cutter, said support being movable to carry the cutter into and out of operative relation to the grinding memher and having provision for mounting the cutter rotatably thereoni, a feed member connected to move in unison .with the rotary movement of the cutter, and operating means for the feed member also carried by said support and movable relatively thereto in a direction to effect rotation of the cutter during movement of the support in a directiol'i away from the grinding member.

A machine of theclass described haying. in combination, a grinding member; a support for a cutter, said support being movable to carry the cutter into and out of operative relation to the grinding member and having provision for mounting the cutter rotatahly thereon, a feed member carried by the support and connected to move in unison with the rotary movement of the cutter. means carried by said support and movable relatively thereto for operating said feed member to efiect rotation of the cutter, and means for imparting moven'mnh t0 said Operating Imam tu lzurr: the, cutter a predetermincsd. said support in. a direction to Withdraw the (utter from. ope atiw Ik'ilfili'lOll 'm the grind .ing member.

:3, Amzuzhine of the clas ing, in cm'nbinatim a gri; support for a. cuttely sail; mounted For snbstantially matill described haw 11g member, a support being in move mum; to carry the cutter into and out of npemtlve relutwn m the gnm'img memliler HOD for molmtnzg the cultfind hln ing 11H). but mtatably thereon, a. paw and Masher, device earlie by said sunpo l nmunge tl to impart rotative mow dill Lu film cutter, and cum mmns for impmfil lmwcmvni to said dm'ice to turn thu cutter a mined (l. l'anr-e m, a n'uwmnenlm Skill, sup pom 4. A machine. of the ing, in combination, :1 saplmrt F0? a cutter, movable tn carry the antiwar 'ilylbo and out, 1111' ()[Kl'illZiYG relnli lmx tn tlw grimlir 12101111161." and having provision for mtin the cuttel l'otntably thereon. :1 i myriad lay the support late with hp chi'l'er. a slid ed on the support a pawl slide and arrmgci i tn 0; l

k V l the lelarl Wheel marl opermc Hm Mints ma 1: mm'l'zm-mx bf the slide 21ml, mm 11 for opuwttlngr snicl slide to Ml'ew mi: feed Whwl Emil nutter (m 1:1 Wm11)1.\ 1 01? said sup'pm't.

I). A mauhimof the t'ri 'reifl hm 511g, in COTYilI iImlIlOH. n

A support in :1 rut-ten IHUY'JlLlQ to carry the (:1

0f m :mt'lve relntinn in lill. but and having: 'gn'ovision Witter rntutubly {hm-eon. :1 von mcterl t0 'lOlCilllfi wit] ing means; for 119 fowl member by th support and :ul'smqnd e-zl tmqv pusl tz'i l'ml l'l in and 11:0:1111-1 me: I (E m.-

movable to carry the lizl'lttcr l and out of operative relation to the a mailing men-Abel and having: provision for mmmting the a 1' tar rotulza ivly thereon, a toothed feed Whel m1 rrim'l h s the Support and cm'n'mcteal. to .v'ntatrr with the anthem operating" m riecl by 'clw smpport and. mnv Q 1 thereto; fm engaging the tee wheel to mm said wheel mm.

fecal 121 mm."

d'ismnve on av n'mwzment of.

2 ltter 51. p11 L 131m; mt 0f 521 l" and 1'01 lmpartmg upunnt'ivc rm:

and having; n

ml to rotate with Lfilfl illlil an :1. mmm'leni', of .11 lion away fmm blur mums; illl'am fml 1w vent mi-Minn all cutter in. 0' ma; YHQIUlJEfL .ln 5*. .nm lvi 11mm in: feed meml) u djmtmc'm; (i l-"i 1s J, l l of the cuttmr it In a mi:

""wll; for a tootlwvl 161111;; a ""tftlllllli securing the us far hn'm'r'i'lngz Lu YOllllYj v 910E111 n 3m" n'v-im'ntu-J. lmlilez' run]. norm: 1 and mrnma initially mlniiw alugn'alll l holder and fled rneinl'imr l Irv-ember to Fills 41in a, pawl; mlation to the cutter during l lm apex-ration.

.10. 'In a machine oil tzm the COTnb'll'lilflO]! with 2!, grix'ullng'l support for a W. ed button mm" lmlmling a r l mrjmalzeil 1111??"1115 m A m the mattw 1 ing means .mrtmg in L. l

1,127,ses

termittentr rotary movement and including, a Feed membermounted cmiecntrically vvith said spindle and rotatable thereon or therewith, said spindle and feed member being relatively adjustable through relative rotation thereof. and means for securing said spindle/and vteed member together in adj usted positionso as to prevent relative rotation t-hereol' durii'igi the grinding of the teeth of the cutter.

11. In a machine of the class described, the combination with a grinding member, of a support for a toothed critter, said support including a rotatable holder with provision for securing he cutter thereon, feeding means for imparting to the holder intermittent rotary movement and including a feed member mounted concentrically with the holder and normally rotatable therewith, said holder and feed member each having an arm connected therewith, means for effooting relative angular adjustment of said arms to position relatively the feed member and the holder, and means for securing said holder and member together in adjusted position.

1,2. In a machine of the class described, the combination with a grinding member, of a support for a toothed cutter, said support including a rotatably mounted spindle with means for securing the cutter thereon, feeding means for imparting to-said spindle intermittent rotary movement to bring the teeth of the cutter successively into position to be ground, said means including a sleeve rotatably mounted on said spindle and a feed member secured to said sleeve, said spindle and sleeve each having an arm projecting therefrom, and means for efiecting relative angular adjustment of said arms to position relatively the feed member and the cutter.

13. In a machine of the class described, the combination with a grinding member, of

a support for a toothed cutter, said support each of said rotatable elen ients having; an arm projecting therefrom, means for securingz said arms together to effect rotation of the cutter by movement of said feed member, and means for etlecting initially relative-angular adjustment of said arms to position relatively the feed member and the cutter.

ll. In a machine of the class described, the combination with a grinding member, of a support for a toothed cutter, said support including concentric rotatable elements, one of said elements having provision for securing the cutter thereon, feeding means for imparting intermittent rotary movement to the cutter and including a feed member secured upon said other rotatable element, each of said rotatable elements having an arm projecting therefrom, said elements being arranged to rotate in unison to effect rotation of the cutter by movement of said feed member, and means for effecting initially relative angular adjustment of said arms to position relatively the feed member and the cutter comprising a screw-threaded spindle journaled in one of said arms and having means longitudinally movable upon the threaded portion thereof and in engagement with the other arm.

15. A. machine of the class-described having, in combination, a grinding member, a support for a cutter, said support being movable to carry the cutter into and out of operative relation to the grinding member, a base upon which said support is mounted,

said base being adj ustably connected with the frame of the machine to vary the path of movement of the support with reference to the grinding member, a screw threaded through said base and engaging a fixed portion of the machine for effecting said adj ustment of the base, and means for securing said base in adjusted position.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

JOHN J, HEYS,

Witnesses:

HOWARD H. G. Pnnnrns, Cnns'rnn E. Rocnns.

Corrections in Letters Patent No. 3 27,888.

It is hereby certified that in Letfiere Petefit No. 1,127,888, granted February 9, 1915, upon the application oflIohn J. Heys, of Lynn, Massachusetts, fer an inqilrcwement in Grinding-Machines, errors appear in the print-ed specifimtion requiring C-OIIGGtIiQ II as fo llowsz Page 4, line 65, after the word eutter insert a comma; same page, line- 105, after the word f eed insert the WOId mamlwr; end that the m1 llwtters Patent should be read with these corrections therein that the same may conform. to the record of tbe ease in th'e Patent Office.

Signed and sealed thin 5th day of June, A; D.., 19 15 a R. F. WHITEHEAD,

[emu] Aciwg Commisn'mxer of Paten 

